--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2005-2008 Lennart Poettering
+ Copyright 2014 Daniel Buch
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <netinet/in.h>
+#include <resolv.h>
+#include <errno.h>
+
+#include "socket-util.h"
+#include "sd-resolve.h"
+#include "resolve-util.h"
+#include "macro.h"
+
+static int getaddrinfo_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, void *userdata) {
+ const struct addrinfo *i;
+
+ assert_se(q);
+
+ if (ret != 0) {
+ log_error("getaddrinfo error: %s %i", gai_strerror(ret), ret);
+ return 0;
+ }
+
+ for (i = ai; i; i = i->ai_next) {
+ _cleanup_free_ char *addr = NULL;
+
+ assert_se(sockaddr_pretty(i->ai_addr, i->ai_addrlen, false, true, &addr) == 0);
+ puts(addr);
+ }
+
+ printf("canonical name: %s\n", strna(ai->ai_canonname));
+
+ return 0;
+}
+
+static int getnameinfo_handler(sd_resolve_query *q, int ret, const char *host, const char *serv, void *userdata) {
+ assert_se(q);
+
+ if (ret != 0) {
+ log_error("getnameinfo error: %s %i", gai_strerror(ret), ret);
+ return 0;
+ }
+
+ printf("Host: %s -- Serv: %s\n", strna(host), strna(serv));
+ return 0;
+}
+
+static int res_handler(sd_resolve_query *q, int ret, unsigned char *answer, void *userdata) {
+ int qdcount, ancount, len;
+ const unsigned char *pos = answer + sizeof(HEADER);
+ unsigned char *end = answer + ret;
+ HEADER *head = (HEADER *) answer;
+ char name[256];
+ assert_se(q);
+
+ if (ret < 0) {
+ log_error("res_query() error: %s %i", strerror(errno), errno);
+ return 0;
+ }
+
+ if (ret == 0) {
+ log_error("No reply for SRV lookup");
+ return 0;
+ }
+
+ qdcount = ntohs(head->qdcount);
+ ancount = ntohs(head->ancount);
+
+ printf("%d answers for srv lookup:\n", ancount);
+
+ /* Ignore the questions */
+ while (qdcount-- > 0 && (len = dn_expand(answer, end, pos, name, 255)) >= 0) {
+ assert_se(len >= 0);
+ pos += len + QFIXEDSZ;
+ }
+
+ /* Parse the answers */
+ while (ancount-- > 0 && (len = dn_expand(answer, end, pos, name, 255)) >= 0) {
+ /* Ignore the initial string */
+ uint16_t pref, weight, port;
+ assert_se(len >= 0);
+ pos += len;
+ /* Ignore type, ttl, class and dlen */
+ pos += 10;
+
+ GETSHORT(pref, pos);
+ GETSHORT(weight, pos);
+ GETSHORT(port, pos);
+ len = dn_expand(answer, end, pos, name, 255);
+ printf("\tpreference: %2d weight: %2d port: %d host: %s\n",
+ pref, weight, port, name);
+
+ pos += len;
+ }
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_resolve_query_unref_ sd_resolve_query *q1 = NULL, *q2 = NULL, *q3 = NULL;
+ _cleanup_resolve_unref_ sd_resolve *resolve = NULL;
+ int r = 0;
+
+ struct addrinfo hints = {
+ .ai_family = PF_UNSPEC,
+ .ai_socktype = SOCK_STREAM,
+ .ai_flags = AI_CANONNAME
+ };
+
+ struct sockaddr_in sa = {
+ .sin_family = AF_INET,
+ .sin_port = htons(80)
+ };
+
+ assert_se(sd_resolve_default(&resolve) >= 0);
+
+ /* Test a floating resolver query */
+ sd_resolve_getaddrinfo(resolve, NULL, "redhat.com", "http", NULL, getaddrinfo_handler, NULL);
+
+ /* Make a name -> address query */
+ r = sd_resolve_getaddrinfo(resolve, &q1, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints, getaddrinfo_handler, NULL);
+ if (r < 0)
+ log_error_errno(r, "sd_resolve_getaddrinfo(): %m");
+
+ /* Make an address -> name query */
+ sa.sin_addr.s_addr = inet_addr(argc >= 3 ? argv[2] : "193.99.144.71");
+ r = sd_resolve_getnameinfo(resolve, &q2, (struct sockaddr*) &sa, sizeof(sa), 0, SD_RESOLVE_GET_BOTH, getnameinfo_handler, NULL);
+ if (r < 0)
+ log_error_errno(r, "sd_resolve_getnameinfo(): %m");
+
+ /* Make a res_query() call */
+ r = sd_resolve_res_query(resolve, &q3, "_xmpp-client._tcp.gmail.com", C_IN, T_SRV, res_handler, NULL);
+ if (r < 0)
+ log_error_errno(r, "sd_resolve_res_query(): %m");
+
+ /* Wait until the three queries are completed */
+ while (sd_resolve_query_is_done(q1) == 0 ||
+ sd_resolve_query_is_done(q2) == 0 ||
+ sd_resolve_query_is_done(q3) == 0) {
+
+ r = sd_resolve_wait(resolve, (uint64_t) -1);
+ if (r < 0) {
+ log_error_errno(r, "sd_resolve_wait(): %m");
+ assert_not_reached("sd_resolve_wait() failed");
+ }
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff